CONTROL SYSTEMS FOR HEATING, VENTILATING, AND AIR CONDITIONING

Abstract

This book is intended to provide guidance to engineers who are designing controls for heating, ventilating and air-conditioning (HVAC) systems and to those who maintain and trouble shoot these systems. Since our last edition, the industry has seen a major transition from analog pneumatic control to digital electronic control. New systems are often a mix of digital controllers with pneumatic actuation, especially if big valves or damper actuators are involved. Simultaneously, all electronic systems have piggy backed on the ever expanding networking technology in buildings (and beyond) and offer expanded control options. We have tried to highlight this in a revised chapter 10. Designers of new systems are referred to chapters 6,7, and 10. Another issue of heightend concern is indoor air quality. Chapter 6 discusses how outdoor air control can insure that the requirements of ASHRAE Standard 62 can be met. Achieving good environmental control in buildings requires a well designed and comrnisssioned HVAC system. The control system makes or breaks the design. We hope our book will provide useful information to practioners, especially those new to our profession.